Method of manufacturing alloys from iron



Patented Aug. 11,1925. 7

' UNITEDTSTATE'S:

PATENT OFFICE;

ALBERT warns, or 3mm, GERMANY.

METHOD OF MANUFACTURING ALLOYS FROM IRON.

No Drawing.

To all whom it may concern:

Be it known that I, ALBERT VVITTIG, a citizen of Germany, and a resident of Berlin, Germany, have invented Improvements in a 5 Method of Manufacturing Alloys from Iron',

of which the following is a specification.

My invention relates to an improved method of manufacturing certain iron alloys free from phosphorus and arsenic.

The commercial iron alloys hitherto employed in the iron metallurgy for refining purposes, such as ferromolybdenum, ferrovanadium, ferro-wolfranium, ferro-chromium and the like fre uently contain a certain percentage of hosp orus and arsenic, which are objectiona 1e and sometimes evenrender the alloys useless as regards the purpose they are mainly intended for. These impurities originate from the raw ores or materials employed for producing the elementary rnetals such as molybdenum, Wolfram and the like therefrom and on account of difliculties hitherto unavoidable in the process of producing the said metals such impurities remain in the latter and, therefore, are also present in the iron alloys to be made by,

melting together iron and thevsaid refining metals.

The object .of my invention is to produce alloys of the kind, which are free from impurities such as phosphorous and arsenic, and

to therebyimprove the quality of such alloys I and the commercial and technical value.

thereof.

Application filed May 7,

The underlying chemical principle'of my; inventiion or method is this :that both 1924. Serial No. 711,744.

from phosphorus and arsenlc and then I employ the thus purified solution for the production of the refining metal or metals contained in said solution in the usual. manner and for-the purpose of making ferro-alloys therefrom. The chemical nature of the zirconium salts or compounds I employ according tomy invention for the precipitation purpose is entirely immaterial. Generallyspeaking zirconium salts of the mineral acids may be.

used, but just aswell hydroxides, carbonates or basic sulphates of zirconium may be employed'instead; I gradually add the. zireoni um compound to the acid solution of the refining metal after having ascertained the existence or the percentage of phosphorus and arsenic therein, in the latter! The subsequent operations are to becar- I ried out'in the customary manner'and need order to precipitate o no description in order to not unnecessarily burden this specification.

- In cases where impurities of the natural zirconium minerals such as iron, silicic acid,

titanium and the like, do not'have any prejudicial eifect, also such impure minerals having been properly broken up or rendered soluble before, may be employed or even any suitable intermediate productsthereof may' be utilized for the purpose of my invention,"

fIt, will be evident that my invention,

whilst still being adhered to in its main jessentials, may be varied and adaptedin many ways, according to the several requirements desired, or most suitable'under different circumstances. 1

\Vhat I claim is g Y The method of purifying a'solutionof'an iron alloying metal, such as vanadium, chromium. titanium, molybdenum and the like by adding thereto a suitable zirconium compound or salt for the purpose ofprecipitating any phosphorus and arsenic such solution, substantially asset orth.

In testimony whereof I have signed my name to this specification.

ALBERT WITTIG.

resent in Y 

